EP 1317096 A2 20030604 - Method for determining a symmetric key over an insecure channel and for digitally signing a message transmitted between a first and a second device
Title (en)
Method for determining a symmetric key over an insecure channel and for digitally signing a message transmitted between a first and a second device
Title (de)
Verfahren zur Bestimmung eines symmetrischen Schlüssels über einen unsicheren Kanal und zur digitalen Signatur bei der Übermittlung einer Nachricht zwischen einer ersten und einer zweiten Vorrichtung
Title (fr)
Procédé de détermination d'une clé symétrique sur un canal non sécurisé et de signature numérique lors de la transmission d'un message entre un premier et un second dispositif
Publication
Application
Priority
DE 10159690 A 20011129
Abstract (en)
The method involves at least one communicating device forming irreducible polynomials and sending to the other device, forming a companion matrix to both polynomials, generating natural numbers as private keys, exponentiating the companion matrices with the keys, one or both devices sending the product of the results to the other and multiplying the received product with its own companion matrices to give the symmetrical key or digital signature. <??>The method involves at least one of the communicating devices forming at least two irreducible polynomials with a randomized or deterministic algorithm and sending them to the other device, forming the companion matrix to both polynomials, generating at least two natural numbers as private keys in each device, exponentiating the companion matrices with the keys in both devices, one or both devices sending the product of the results to the other and one or both devices multiplying the received product with its own companion matrices to give the symmetrical key or digital signature.
Abstract (de)
Es wird ein Verfahren zur Bestimmung eines symmetrischen Schlüssels über einen unsicheren Kanal und zur digitalen Signatur bei der Übermittlung einer Nachricht zwischen einer ersten und einer zweiten Vorrichtung vorgeschlagen, bei dem die Produkte von Potenzen nicht kommutierender Matrizen gebildet werden. <IMAGE>
IPC 1-7
IPC 8 full level
H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 9/32 (2006.01)
CPC (source: EP)
H04L 9/08 (2013.01); H04L 9/3013 (2013.01); H04L 9/3247 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
EP 1317096 A2 20030604; EP 1317096 A3 20031008; DE 10159690 A1 20030618; DE 10159690 C2 20030925
DOCDB simple family (application)
EP 02026598 A 20021128; DE 10159690 A 20011129